$\left(4x+2\right)\left(+-5\right)$
$-10x-5+9$
$x+3\cdot2x^2-x$
$.-+\left[+3\:+\left(-\:2\:-\:1\right)\:+\:\left(-5\:+\:7\:+\:4\right)\right]$
$0.2\cdot0.2\cdot0.2$
$3cos^2\left(x\right)+7cos\left(x\right)-6=0$
$\left(a^3-\:1\right)^3$
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